X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=blobdiff_plain;f=post%2Fdrivers%2Fi2c.c;h=95da2ebdaf528b191bb4c2d83235d4381779869e;hp=1b2e64471b30145607aed0594b8f5c1fd30f7e7e;hb=b4f20767b12a5718ed8549aece73d405c6cac800;hpb=dd0321f5f8d284782abee6e96c6da7548e88839f

diff --git a/post/drivers/i2c.c b/post/drivers/i2c.c
index 1b2e64471b..95da2ebdaf 100644
--- a/post/drivers/i2c.c
+++ b/post/drivers/i2c.c
@@ -2,93 +2,96 @@
  * (C) Copyright 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#include <common.h>
-
-#ifdef CONFIG_POST
-
 /*
  * I2C test
  *
  * For verifying the I2C bus, a full I2C bus scanning is performed.
  *
- * #ifdef I2C_ADDR_LIST
- *   The test is considered as passed if all the devices and
- *   only the devices in the list are found.
- * #else [ ! I2C_ADDR_LIST ]
+ * #ifdef CONFIG_SYS_POST_I2C_ADDRS
+ *   The test is considered as passed if all the devices and only the devices
+ *   in the list are found.
+ *   #ifdef CONFIG_SYS_POST_I2C_IGNORES
+ *     Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES.  These devices
+ *     are optional or not vital to board functionality.
+ *   #endif
+ * #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
  *   The test is considered as passed if any I2C device is found.
  * #endif
  */
 
+#include <common.h>
 #include <post.h>
 #include <i2c.h>
 
-#if CONFIG_POST & CFG_POST_I2C
+#if CONFIG_POST & CONFIG_SYS_POST_I2C
+
+static int i2c_ignore_device(unsigned int chip)
+{
+#ifdef CONFIG_SYS_POST_I2C_IGNORES
+	const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
+	int i;
+
+	for (i = 0; i < sizeof(i2c_ignore_list); i++)
+		if (i2c_ignore_list[i] == chip)
+			return 1;
+#endif
+
+	return 0;
+}
 
 int i2c_post_test (int flags)
 {
 	unsigned int i;
-	unsigned int good = 0;
-#ifdef I2C_ADDR_LIST
-	unsigned int bad  = 0;
+#ifndef CONFIG_SYS_POST_I2C_ADDRS
+	/* Start at address 1, address 0 is the general call address */
+	for (i = 1; i < 128; i++) {
+		if (i2c_ignore_device(i))
+			continue;
+		if (i2c_probe (i) == 0)
+			return 0;
+	}
+
+	/* No devices found */
+	return -1;
+#else
+	unsigned int ret  = 0;
 	int j;
-	unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
-	unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
-#endif
+	unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
 
-	for (i = 0; i < 128; i++) {
-		if (i2c_probe (i) == 0) {
-#ifndef	I2C_ADDR_LIST
-			good++;
-#else	/* I2C_ADDR_LIST */
-			for (j=0; j<sizeof(i2c_addr_list); ++j) {
-				if (i == i2c_addr_list[j]) {
-					good++;
-					i2c_miss_list[j] = 0xFF;
-					break;
-				}
-			}
-			if (j == sizeof(i2c_addr_list)) {
-				bad++;
-				post_log ("I2C: addr %02X not expected\n",
-						i);
+	/* Start at address 1, address 0 is the general call address */
+	for (i = 1; i < 128; i++) {
+		if (i2c_ignore_device(i))
+			continue;
+		if (i2c_probe(i) != 0)
+			continue;
+
+		for (j = 0; j < sizeof(i2c_addr_list); ++j) {
+			if (i == i2c_addr_list[j]) {
+				i2c_addr_list[j] = 0xff;
+				break;
 			}
-#endif	/* I2C_ADDR_LIST */
 		}
-	}
 
-#ifndef	I2C_ADDR_LIST
-	return good > 0 ? 0 : -1;
-#else	/* I2C_ADDR_LIST */
-	if (good != sizeof(i2c_addr_list)) {
-		for (j=0; j<sizeof(i2c_miss_list); ++j) {
-			if (i2c_miss_list[j] != 0xFF) {
-				post_log ("I2C: addr %02X did not respond\n",
-						i2c_miss_list[j]);
-			}
+		if (j == sizeof(i2c_addr_list)) {
+			ret = -1;
+			post_log("I2C: addr %02x not expected\n", i);
 		}
 	}
-	return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1;
+
+	for (i = 0; i < sizeof(i2c_addr_list); ++i) {
+		if (i2c_addr_list[i] == 0xff)
+			continue;
+		if (i2c_ignore_device(i2c_addr_list[i]))
+			continue;
+		post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
+		ret = -1;
+	}
+
+	return ret;
 #endif
 }
 
-#endif /* CONFIG_POST & CFG_POST_I2C */
-#endif /* CONFIG_POST */
+#endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */